How the airline industry is cleaning up its climate act

Aviation is one of the most polluting industries on the planet–but a groundswell of innovation in alternative fuels, and investments from major airlines, could set it on a path to carbon zero. At a steel mill outside Beijing, reactors attached to the building capture emissions from the factory. Those waste gases can then be turned into fuel. LanzaTech, a biotech startup that designed a way to turn those emissions into ethanol, recently blended that ethanol into jet fuel that powered a Virgin A...